package com.xiaoyang.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;

import com.xiaoyang.common.BaseContext;
import com.xiaoyang.common.R;
import com.xiaoyang.domain.Category;
import com.xiaoyang.domain.Dish;
import com.xiaoyang.domain.DishFlavor;
import com.xiaoyang.dto.DishDto;
import com.xiaoyang.service.CategoryService;
import com.xiaoyang.service.DishFlavorService;
import com.xiaoyang.service.DishService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.*;

import java.util.List;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

/**
 * @auther XiaoYang
 * @DATE 2022/12/12-14:21
 * 菜品管理
 */
@RestController
@Slf4j
@RequestMapping("/dish")
public class DishController {
    @Autowired
    private DishService dishService;
    @Autowired
    private DishFlavorService dishFlavorService;
    @Autowired
    private CategoryService categoryService;
    @Autowired
    private RedisTemplate redisTemplate;

    /**
     * 新增菜品
     * @param dto
     * @return
     */
    @PostMapping
    public R<String> save(@RequestBody DishDto dto){
        log.info("新增菜品");

        dishService.saveWithFlavor(dto);
        //清理所有菜品的缓存数据
        //Set keys = redisTemplate.keys("dish_*");
        //redisTemplate.delete(keys);

        //清理某个分类下面的缓存
        String key = "dish_" + dto.getCategoryId() + "_" + dto.getStatus();
        redisTemplate.delete(key);
        log.info("删除缓存菜品:{}",key);

        return R.success("新增菜品成功");
    }

    /**
     * 根据id查询菜品信息和对应的口味信息
     * @param id
     * @return
     */
    @GetMapping("/{id}")
    public R<DishDto> get(@PathVariable Long id){

        DishDto dishDto = dishService.getByIdWithFlavor(id);

        return R.success(dishDto);
    }

    /**
     * 更新菜品信息
     * @param dishDto
     * @return
     */
    @PutMapping
    public R<String> update(@RequestBody DishDto dishDto){
        log.info("修改菜品:{}",dishDto.getId());

        dishService.updateWithFlavor(dishDto);
        dishService.updateWithSetmealDish(dishDto);

        //清理所有菜品的缓存数据
        //Set keys = redisTemplate.keys("dish_*");
        //redisTemplate.delete(keys);

        //清理某个分类下面的缓存
        String key = "dish_" + dishDto.getCategoryId() + "_" + dishDto.getStatus();
        redisTemplate.delete(key);
        log.info("删除缓存菜品:{}",key);

        return R.success("修改菜品成功");
    }

    /**
     * 修改菜品状态(起售，停售)
     * @param toStatus 要修改的状态
     * @param ids 菜品id
     * @return
     */
    @PostMapping("/status/{toStatus}")
    public R<String> updateStatus(@PathVariable Integer toStatus,Long[] ids){

        for (Long id : ids) {
            Dish dish = new Dish();
            dish.setId(id);
            dish.setStatus(toStatus);
            dishService.updateById(dish);
        }

        BaseContext.close();
        return R.success("修改成功");
    }

    /**
     * 根据菜品id删除菜品和口味表中的数据
     * @param ids
     * @return
     */
    @DeleteMapping
    public R<String> deleteById(Long[] ids){

        dishService.deleteWithFlavor(ids);


        return R.success("删除菜品成功");
    }

    /**
     * 菜品信息分页
     * @param page
     * @param pageSize
     * @param name
     * @return
     */
    @GetMapping("/page")
    public R<Page<DishDto>> page(int page,int pageSize,String name){

        //构造分页构造器
        Page<Dish> pageInfo = new Page<>(page,pageSize);
        //没有菜品分类需要dto实现
        Page<DishDto> dishDtoPage = new Page<>();

        //条件构造器
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        //添加name查询条件
        queryWrapper.like(name !=null,Dish::getName,name);
        //添加排序
        queryWrapper.orderByDesc(Dish::getUpdateTime);

        //执行分页查询
        dishService.page(pageInfo,queryWrapper);

        //对象拷贝
        BeanUtils.copyProperties(pageInfo,dishDtoPage,"records");

        List<Dish> records = pageInfo.getRecords();
        List<DishDto> list = records.stream().map((item) -> {
            DishDto dishDto = new DishDto();

            BeanUtils.copyProperties(item,dishDto);

            Long categoryId = item.getCategoryId();//获取分类id
            //根据id查询分类对象
            Category category = categoryService.getById(categoryId);

            if (category!=null){
                String categoryName = category.getName();
                dishDto.setCategoryName(categoryName);
            }

            return dishDto;

        }).collect(Collectors.toList());

        dishDtoPage.setRecords(list);

        BaseContext.close();
        return R.success(dishDtoPage);
    }

//    /**
//     * 根据条件查询菜品数据(添加套餐)
//     * @param dish
//     * @return
//     */
//    @GetMapping("/list")
//    public R<List<Dish>> list(Dish dish){
//        //构造查询条件
//        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
//        queryWrapper.eq(dish.getCategoryId() != null,Dish::getCategoryId,dish.getCategoryId());
//        //是否起售
//        queryWrapper.eq(Dish::getStatus,1);
//
//        //添加排序条件
//        queryWrapper.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);
//
//        //查询
//        List<Dish> list = dishService.list(queryWrapper);
//
//        BaseContext.close();
//
//        return R.success(list);
//    }
    /**
     * 根据条件查询菜品数据(添加套餐)
     * @param dish
     * @return
     */
    @GetMapping("/list")
    public R<List<DishDto>> list(Dish dish){
        List<DishDto> dishDtoList = null;
        //动态拼接key，实现分类查询
        String key = "dish_" + dish.getCategoryId() + "_" + dish.getStatus();//dish_135518213721841_1
        //先从redis中获取缓存数据
        dishDtoList = (List<DishDto>) redisTemplate.opsForValue().get(key);

        if (dishDtoList != null){
            //如果存在，直接返回，无需查询数据库
            return R.success(dishDtoList);
        }

        //构造查询条件
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(dish.getCategoryId() != null,Dish::getCategoryId,dish.getCategoryId());
        //是否起售
        queryWrapper.eq(Dish::getStatus,1);

        //添加排序条件
        queryWrapper.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);

        //查询
        List<Dish> list = dishService.list(queryWrapper);

        dishDtoList = list.stream().map((item) -> {
            DishDto dishDto = new DishDto();

            BeanUtils.copyProperties(item,dishDto);

            Long categoryId = item.getCategoryId();//获取分类id
            //根据id查询分类对象
            Category category = categoryService.getById(categoryId);

            if (category!=null){
                String categoryName = category.getName();
                dishDto.setCategoryName(categoryName);
            }

            //当前菜品id
            Long dishId = item.getId();
            LambdaQueryWrapper<DishFlavor> dishFlavorLambdaQueryWrapper = new LambdaQueryWrapper<>();
            dishFlavorLambdaQueryWrapper.eq(DishFlavor::getDishId,dishId);
            List<DishFlavor> dishFlavorList = dishFlavorService.list(dishFlavorLambdaQueryWrapper);
            dishDto.setFlavors(dishFlavorList);

            return dishDto;

        }).collect(Collectors.toList());

        //如果不存在，需要查询数据库，将查询到的菜品缓存到redis
        redisTemplate.opsForValue().set(key,dishDtoList,60, TimeUnit.MINUTES);

        BaseContext.close();

        return R.success(dishDtoList);
    }

}
